/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.org.apache.xerces.internal.util;

import org.xml.sax.Locator;
import org.xml.sax.ext.Locator2;

import com.sun.org.apache.xerces.internal.xni.XMLLocator;

/**
 * <p>A light wrapper around a SAX locator. This is useful
 * when bridging between SAX and XNI components.</p>
 *
 * @author Michael Glavassevich, IBM
 */
public final class SAXLocatorWrapper implements XMLLocator {

  private Locator fLocator = null;
  private Locator2 fLocator2 = null;

  public SAXLocatorWrapper() {
  }

  public void setLocator(Locator locator) {
    fLocator = locator;
    if (locator instanceof Locator2 || locator == null) {
      fLocator2 = (Locator2) locator;
    }
  }

  public Locator getLocator() {
    return fLocator;
  }

    /*
     * XMLLocator methods
     */

  public String getPublicId() {
    if (fLocator != null) {
      return fLocator.getPublicId();
    }
    return null;
  }

  public String getLiteralSystemId() {
    if (fLocator != null) {
      return fLocator.getSystemId();
    }
    return null;
  }

  public String getBaseSystemId() {
    return null;
  }

  public String getExpandedSystemId() {
    return getLiteralSystemId();
  }

  public int getLineNumber() {
    if (fLocator != null) {
      return fLocator.getLineNumber();
    }
    return -1;
  }

  public int getColumnNumber() {
    if (fLocator != null) {
      return fLocator.getColumnNumber();
    }
    return -1;
  }

  public int getCharacterOffset() {
    return -1;
  }

  public String getEncoding() {
    if (fLocator2 != null) {
      return fLocator2.getEncoding();
    }
    return null;
  }

  public String getXMLVersion() {
    if (fLocator2 != null) {
      return fLocator2.getXMLVersion();
    }
    return null;
  }

} // SAXLocatorWrapper
